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#include "efl_gfx_color_internal.h"
static int
_hex_string_get(char ch, Eina_Bool *ok)
{
if ((ch >= '0') && (ch <= '9')) return (ch - '0');
else if ((ch >= 'A') && (ch <= 'F')) return (ch - 'A' + 10);
else if ((ch >= 'a') && (ch <= 'f')) return (ch - 'a' + 10);
*ok = EINA_FALSE;
return 0;
}
/**
* @internal
* Parses a string of one of the formas:
* 1. "#RRGGBB"
* 2. "#RRGGBBAA"
* 3. "#RGB"
* 4. "#RGBA"
* To the rgba values.
*
* @param[in] str The string to parse - NOT NULL.
* @param[out] r The Red value - NOT NULL.
* @param[out] g The Green value - NOT NULL.
* @param[out] b The Blue value - NOT NULL.
* @param[out] a The Alpha value - NOT NULL.
*/
Eina_Bool
_gfx_color_format_color_parse(const char *str, int slen,
unsigned char *r, unsigned char *g,
unsigned char *b, unsigned char *a)
{
Eina_Bool v = EINA_TRUE;
*r = *g = *b = *a = 0;
if (slen == 7) /* #RRGGBB */
{
*r = (_hex_string_get(str[1], &v) << 4) | (_hex_string_get(str[2], &v));
*g = (_hex_string_get(str[3], &v) << 4) | (_hex_string_get(str[4], &v));
*b = (_hex_string_get(str[5], &v) << 4) | (_hex_string_get(str[6], &v));
*a = 0xff;
}
else if (slen == 9) /* #RRGGBBAA */
{
*r = (_hex_string_get(str[1], &v) << 4) | (_hex_string_get(str[2], &v));
*g = (_hex_string_get(str[3], &v) << 4) | (_hex_string_get(str[4], &v));
*b = (_hex_string_get(str[5], &v) << 4) | (_hex_string_get(str[6], &v));
*a = (_hex_string_get(str[7], &v) << 4) | (_hex_string_get(str[8], &v));
}
else if (slen == 4) /* #RGB */
{
*r = _hex_string_get(str[1], &v);
*r = (*r << 4) | *r;
*g = _hex_string_get(str[2], &v);
*g = (*g << 4) | *g;
*b = _hex_string_get(str[3], &v);
*b = (*b << 4) | *b;
*a = 0xff;
}
else if (slen == 5) /* #RGBA */
{
*r = _hex_string_get(str[1], &v);
*r = (*r << 4) | *r;
*g = _hex_string_get(str[2], &v);
*g = (*g << 4) | *g;
*b = _hex_string_get(str[3], &v);
*b = (*b << 4) | *b;
*a = _hex_string_get(str[4], &v);
*a = (*a << 4) | *a;
}
else v = EINA_FALSE;
*r = (*r * *a) / 255;
*g = (*g * *a) / 255;
*b = (*b * *a) / 255;
return v;
}
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